Planograph co



E. W. CLEVELAND. 'ADJUS-TABLE A'RM FOR MULTIPLE DRILLS.

APPLICATION FILED MAR. 12. I919.

Patentedsept. 16, 1919.

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1 tion which is simple to manufacture, yet

EDGAR; W. CLEVELAND, OF HOLLAND, MXCI-IIG'AN.

ADJUSTABLE ARM ron MULTIPLE DRILLS.

Specification of Letters Patent. Patented. Sept, 16, 1919.

Application filed March 12, 1919. SerialNo. 282,223. i

To allwhom it may concern:

Be it known that I, EDGAR W. CLEVELAND,

a citizen of the United States of America, residing at Holland, in the county of Ottawa and State of Michigan, have invented certain new and useful Improvements in Ad ustable Arms for Multiple Drills; and

T do hereby declare the following to be a full, clear, and exact description of the in vention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in adjustable arms for multiple spindle drills. In such construction, a plurality of arms are used to carry drills, the arms being adjustably mounted on a common head, and each 1 arm carries at its end a vertically adjust able journal box in which a drill spindle is rotatably mounted, and in practice all of the spindles are drlven from a common source of power. The drills usually are of varied lengths, and it is many times necessary to drill holes of different depths, maklng it imperative that the journal boxesbe vertically adjustable on their respectlve arms,

and it is further necessary that such j ournal boxes shall be quickly and easily adjustable, and firmly held in any position to which adjusted. By reason of the fact that such drill spindles are frequently placed closely together, it is necessary that the adjusting means shall be accessible for ad ustment and changes. The present invent1on has forits object and purpose, the attainment of all of these desiredends by means of a construcespecially effective in operation. 'Many other objects and purposes other than that stated will appear as understanding of the inventionis had from the following description, taken in connection with the accompanying drawing, in which,

Figure 1" is a fragmentary sectional view showing one preferred form of adjusting device for the journal box on an arm of a multiple spindle drill.

Fig. 2 is a horizontal section taken on the line 2-42, of Fig. 1.

Fig. 3isa view,to' reduced scale, and similar to Fig; 1 of a modified form for serving the same purpose.

Fig. 4 is a horizontal section on the line Fig. 5 illustrates a still furthermodification in form of equalizingv adjustment bar for the journal box, and

Fig. 6 is an elevation of the: bar used in at one end by a portion 2 in which, in the form shown in Fig. 1, twospaced apart vertical slots 3 are cut. The opposite end of the arm is not shown in the drawing, but is of the usual and well known construction, similar, for instance to that shown in my previous Patent No. 1,082,009.

A block l is-fitted to slide vertically on the end 2 of the arm, and integral. therewith is a sleeve '5 which serves as the journal box in which the drill spindle 6 is rotatably mounted,the same carrying adrill receiving socket 7 at its lower end below the journal box. The block 4 is adjustably connected to the arm by bolts 8 whichhave heads 9 as shown, the bolts passing through the slots 3 of the arm while the heads 9 are located ends of which are cut at oppositely inclined bevels as indicated at 11 and bear against correspondingly cut inclines on the heads 9.

The rod 10 is entered into the block 4:

through a vertical opening 12 bored the entire length ofthe block substantially paral-- lel to the axis of the spindle 6; while the bolts 8-and heads 9 thereof are placed in position by inserting the same through transverse openings 13 bored adjacent the upper end and lower end of the j ourna-l box, as shown. A bar 1 1 having openings adjacent its ends topass the bolts 8 is placed over said bolts and against theinner side of i the end 2 of the arm and nuts 15 are threaded on to the ends ofthe bolts to draw the'journal box and the block 4: integrally formed therewith tightly against the arm so as to fix the same against movement with respect to the arm. The barl l is the equivalent of two washers, one around each bolt 14 and it isobvious that the bar may be re placed by such washers.

With this construction, it is obvious that the nuts 15 on the lower bolt 8 are readily accessible for tightening or loosening, but that the nuts on the upper" bolt cannot be operated as readily, particularly when the arm is attached to a drill head which lies above the arm and more or less covers the arm so that access to the upper nuts 15 is almost impossible. This. is true of practically all forms of drill arms. However, as soonas the lower nuts 15 are loosened and the lower bolt released, the rod is allowed to drop slightly, this serving to release the upper bolt without changing the nuts 15 thereon and the. journal box may then be moved within the limits prescribed by the length of the slots 3.. As soon as the box is properly positioned, the lower nuts 15 are tightened, drawing the head 9 of the lower bolt against the bevel 11 at the lower end of rod 10 and causing the rod to be elevated. so that its upper end similarly but oppositely beveled engages against head 9 of the upper bolt, and causing a simultaneous and equal tightening of both the upper and lower ends of the journal box against the end of the arm. The operation of the lower nuts.

members acted upon so that no bending or buckling of the same is possible. The housing of the rod'lO provides a support for the same throughout its length which precludes any buckling of the same. There is nothing to get out of order, and the adjustment de 'eled ends 11 sired can be quickly and readily effected as the nut 15 on the lower bolt 8 is always readily accessible whatever the position of the arm and no matter how closely associated with the other arms on the machine.

In Figs. 3 and 4, a modified form of the invention is shown. The slots 3 in the end of the arm are eliminated and a T-slot 16 is cutlengthwise of and in the side of the block 4 next to the end of the arm and heads 17 of T-bolts 18 are located in said blocks which take the place of the bolts 8. The bolts 18 pass through bushings 19 which are inserted in openings 20 bored into the end 2 of the arm. A shorter rod 10 having bevis' located in an opening 21 bored vertically from the bottom in the end 2 of the arm, said rod being disposed between the ends of the bushings 19 which are cut at an incline to correspond with the beveled portions 11 of the bushings; A nut 15 threads on to the end of each of the bolts 18 and against the' bushings.

The operation of loosening, and tightening the lower nut for release of the journal box is the same as in the former construction, and the adjustment is the same except that the box is moved up or down, the heads 17 changing position in the slot 16, instead of the bolts moving back and forth in slots in the end of the arm as before. In all other respects the operation is the same, and the same advantages are present.

In Figs. 5 and 6 a further modification is partially illustrated. A bar 22 is placed directly against the inner side of the end 2 or end 2 of the arm, shown in Figs. 3 and 1, and the bolts 18 pass through openings slightly elongated and countersunk as indicated at 23. Bushings 21 having tapered sides to seat in the countersunk portions of the openings are placed around the bolts 18 and nuts 15 thread on to the bolts. The elongation of the openings 23 permits a slight movement of the bar 22 up and down when the lower nuts are loosened, and there is a clearance between the upper side of the upper bushing and the countersunk part of the opening in which it is seated, and a similar clearance between the lower portion of the lower bushing and the countersunk recess in which it is seated when the nuts are tightened. From this construction, it is apparent that the adjustment of the journal box may be effected by loosening the lower nut on the lower bolt as before, and this construction is applicable to either of the forms of arms shown in both Figs. 1 and 3. This construction is more economical to make than either of the others as the bushings 24: are a screw machine product,

nd there is no need to bore openings such as are necessary to receive the pins 10 and 10 The principle of operation is the same, however, and with this construction, as well as the others, the lower nut is accessible and may be quickly and readily worked to accomplish the adjustment, and the bar 22 is movable lengthwise the same as the pins or rods 10 and 10 when the lower bolt is tightened to eflect a simultaneous and equal tightening of the upper belt.

I claim:

1. An adjustable arm for multiple spindle drills, comprising an arm, a vertically adjustable journal box at one end of the arm, a member formed with oppositely beveled ends disposed vertically, bolts connecting the journal box to the arm, and means on said bolts for engaging the ends of said member to move the same vertically whereby the box may be released or secured in place by loosening or tightening one only of the bolts, substantially as described.

2. An adjustable arm for multiple spindle drills, comprising an arm, a journal box located at one end of and against the arm, bolts for attaching the box to the arm, a

member having oppositely cut inclined ends ends of said members to move the same vertically as a' bolt is tightened or away from the ends of the member as the bolts are released, whereby tightening or loosenin of one of the bolts will simultaneously tig ten or loosen the other bolt, substantially as described.

4. An adjustable arm for multiple spindle drills, comprising an arm, a journal box located at one end of thearm, bolts disposed one over the other and connecting the box to the arm, a member disposed vertically between the bolts and formed with ends cut at an incline and in opposite directions at one side thereof, and a head on each bolt cut to bear against the inclines on the member, whereby tightening or loosening of one of the bolts simultaneously tightens or loosens the other bolt.

5. An adjustable drill supporting arm comprising an arm, a journal box having a vertical openin therethrough positioned against the end 0 the arm, a rod having its upper and lower ends cut at oppositely extending bevels at one side of the rod, upper and lower bolts having their heads located within the box and extending therefrom through the arm, said heads bearing against the beveled ends of the rod, and a nut threaded on to the end of each bolt, substantially as described.

6. An adjustable drill supporting arm comprising an arm having spaced apart sides connected by an integral portion at one end, said portion having upper and lower vertical slots cut therein, a journal box formed with a vertical opening there through and upper and lower transverse openings extending from the front of the box to the vertical opening therein, a headed bolt entered into each transverse opening,

through the box and through a slot in the end of the arm, a rod formed with oppositely extending beveled ends located insaid vertical opening in the box between the heads of the bolts, said heads bearing against the beveled ends of the rod, and a nut on the end of each bolt to tighten the bolts and fix the box against movement with respect to the arm.

7. An adjustable arm for multiple spindle drills, comprising an arm, a journal box located against one end of the arm, bolts for attaching the box to the arm, a vertical member disposed between the bolts, and means operated by the bolts as either one is tightened to move the member vertically against the similar means on the other bolt, thereby tightening both bolts simultaneously as either one is tightened, or vice versa, substantially as: described.

In testimony whereof I afi ix my signature.

EDGAR W. CLEVELAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

